Case Study of Bad, to Worse, to Success: Emergency Investigation and Trenchless Repair of a 48-in. Diameter Sanitary Sewer Interceptor Crossing at Interstate I-49
Publication: Pipelines 2024
ABSTRACT
In 2021, the City of Fayetteville (the City) performed a remote inspection of the 48-in. gravity sewer from Gregg Avenue to Sunshine Road. Installed in 2006 via hand tunneling, the pipeline is a 48-in. diameter centrifugally cast fiber-reinforced polymer mortar (CCFRPM) pipe inside a 72-in. diameter steel tunnel liner, originally designed with a grouted annulus. The tunneled segment is 913-ft long with fill cover up to 24 ft and runs under Interstate 49 and the Southbound Highway 112 Exit Ramp. The City’s inspection revealed a 100-ft section of localized cracking, damage, and high deflections under the interstate exit ramp, which required trenchless repair. The City retained the investigate-design-build team of Structural Technologies and their subconsultant, Simpson Gumpertz & Heger Inc., to investigate and repair the tunnel. This case study highlights the numerous challenges and multidisciplinary efforts of the project team to successfully implement trenchless repair, including setting up a bypass for the root cause investigation, discovery of unstable tunnel conditions, design of custom shoring solutions, and a three-stage tunnel stabilization effort to allow for installation of a CFRP liner. Thermal sensitivity of the carrier pipe also required a thermal control plan to limit the heat of hydration during grouting.
Get full access to this chapter
View all available purchase options and get full access to this chapter.
REFERENCES
AWWA (American Water Works Association). (2018). Standard for CFRP Renewal and Strengthening of Prestressed Concrete Cylinder Pipe (PCCP), Standard AWWA C305-18, First Edition.
AWWA (American Water Works Association). (2014). Fiberglass Pipe Design, Manual of Water Supply Practices M45, Third Edition.
Information & Authors
Information
Published In
History
Published online: Aug 30, 2024
ASCE Technical Topics:
- Case studies
- Composite materials
- Construction engineering
- Construction management
- Engineering fundamentals
- Engineering materials (by type)
- Fiber reinforced composites
- Fiber reinforced polymer
- Geotechnical engineering
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Inspection
- Materials engineering
- Methodology (by type)
- Pipeline systems
- Pipes
- Polymer
- Research methods (by type)
- Steel pipes
- Synthetic materials
- Transportation engineering
- Trenchless technology
- Tunneling
- Tunnels
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.